CN116893565A - Light source device - Google Patents

Abstract

The light source device comprises a first light source, a second light source, a reflecting mirror, a first spectroscope, a filter film and a diffusion sheet. The first light source is used for outputting first light and the second light source is used for outputting second light. The reflector is arranged on the transmission path of the second light ray and provided with a wavelength conversion material layer. The wavelength conversion material layer receives the second light and converts the second light to output a third light. The first spectroscope is arranged between the first light source and the second light source and is only arranged on the transmission paths of the first light, the second light and the third light. The filter film is arranged on the transmission paths of the first light ray and the third light ray, and the first spectroscope is arranged between the reflector and the filter film. The diffusion sheet is arranged on the transmission path of the second light and between the second light source and the first spectroscope, and the diffusion sheet is used for increasing the conversion efficiency of the wavelength conversion material layer.

Description

Light source device

Technical field

The present invention relates to a light source device, in particular to a light source device with a novel light combining structure.

Background technique

With the development of solid-state light sources and projection technology in recent years, projection devices based on solid-state light sources such as light-emitting diodes (LEDs) and laser diodes have gradually gained favor in the market.

Among the known projector architectures, there is a light-combining architecture that utilizes a phosphor wheel that has both penetration and reflection. Some areas on the phosphor wheel are covered with phosphor, while some areas are transparent. When the phosphor wheel rotates, short-wavelength light (such as blue light) from the outside will excite the phosphor on the phosphor wheel to produce specific color light, and part of the blue light can penetrate the transparent area of the phosphor wheel. Through an appropriate light path structure, the specific color light generated by the phosphor and the color light provided by the light source with other colors are combined to form the illumination beam of the projector structure. However, since in the above-mentioned projector architecture, an appropriate light path structure needs to be set up to guide the blue light that penetrates the phosphor wheel to be combined with other color lights, the overall projector architecture is more complex, requiring more optical components and assembly. The working hours are also longer.

Contents of the invention

The present invention provides a light source device with a simplified light path structure, and a projection device using the light source device has better color performance and better cost-effectiveness.

In an embodiment of the present invention, the light source device includes a first light source, a second light source, a reflector, a first beam splitter, a filter film and a diffusion sheet. The first light source is used to output the first light, and the second light source is used to output the second light. The reflective mirror is disposed on the transmission path of the second light, and the reflective mirror has a wavelength conversion material layer. The wavelength conversion material layer receives the second light and converts it to output the third light. The first beam splitter is disposed between the first light source and the second light source and is only disposed on the transmission path of the first light, the second light and the third light. The filter film is disposed on the transmission path of the first light and the third light, and the first beam splitter is disposed between the reflector and the filter film. The diffusion sheet is disposed on the transmission path of the second light and between the second light source and the first beam splitter. The diffusion sheet is used to increase the conversion efficiency of the wavelength conversion material layer.

In another embodiment of the present invention, the light source device at least includes a first light source, a second light source, a reflective substrate, a first beam splitter, a filter film and a diffusion sheet. The first light source is used to output first light. The second light source is used to output second light. The reflective substrate has a phosphor layer, and the phosphor layer is used to receive the second light and convert it to output a third light. The first beam splitter is only disposed on the transmission path of the first light, the second light and the third light. The first beam splitter has a first surface and a second surface. The first surface is configured to reflect the second light to the reflective substrate and allow at least a portion of the third light to pass through, and the second surface is configured to reflect the first light. The filter film is disposed on the transmission path of the first light and the third light, and the first beam splitter is disposed between the reflective substrate and the filter film. The diffusion sheet is disposed on the transmission path of the second light and between the second light source and the first beam splitter. The diffusion sheet is used to increase the conversion efficiency of the wavelength conversion material layer.

Based on the above, in relevant embodiments of the present invention, since the reflector of the light source device receives the second light and outputs the third light, the light source device does not need to use a light combining structure of a phosphor wheel that has both penetration and reflection. Has a simpler optical path architecture. The light source device has fewer optical components, so the assembly time of the light source device can be effectively reduced. In addition, the filter film of the light source device is disposed on the transmission path of the first light and the third light, so the third light passing through the filter film can have a purer color, so that the projection device using the light source device has a wider range of colors. area. In addition, based on the optical path structure of the light source device, the spectroscope can be designed to pass the light waveband corresponding to the third color. Compared with allowing multiple light wavebands with discontinuous and different colors to pass, the spectroscope allows the light waveband of a single color to pass. The coating design of the mirror is relatively simple and easy to manufacture, making the light source device more cost-effective. The diffusion sheet is used to increase the conversion efficiency of the wavelength conversion material layer to achieve better conversion efficiency.

In order to make the above-mentioned features and advantages of the present invention more obvious and understandable, embodiments are given below and described in detail with reference to the accompanying drawings.

Description of the drawings

FIG. 1 shows a schematic structural diagram of a light source device and a projection device using the light source device according to an embodiment of the present invention.

FIG. 2 shows a simplified plot of light transmittance of the first surface of the first beam splitter versus light wavelength in the embodiment of FIG. 1 .

FIG. 3 shows a plot of normalized light intensity versus wavelength for a third ray exiting the reflector in the embodiment of FIG. 1 .

Figure 4 shows a plot of the conversion efficiency of the converted light versus the half-maximum energy density of the second light with or without a diffuser in some embodiments of the present invention.

FIG. 5 shows a schematic structural diagram of a light source device and a projection device using the light source device according to another embodiment of the present invention.

Explanation of reference signs

100, 500: Light source device

101, 103, 105, 106, 107, 109, 201, 203: Optical lens

102, 130: Reflector

110: First light source

120: Second light source

132: Substrate

134: Reflective layer

136: Wavelength conversion material layer

138: Motor

140: First beam splitter

150: Filter film

160: Third light source

170: Second beam splitter

180: Light uniformity component

190: Diffuser

200, 600: Projection device

202: Prism

210: Light valve

220: Projection lens

530: Reflective substrate

536: Phosphor layer

CL: Convert light

I, II, III: Area

L1: first ray

L2: Second ray

L3: The third ray

L4: The fourth ray

L5: lighting light

L6: Projection light

S1: first surface

S2: Second surface

S3, S4, S5: surface

Detailed ways

FIG. 1 shows a schematic structural diagram of a light source device and a projection device using the light source device according to an embodiment of the present invention. Please refer to FIG. 1 . In this embodiment, the projection device 200 includes a light source device 100, a light valve 210, and a projection lens 220. The light source device 100 includes a first light source 110, a second light source 120, a reflector 130, a first beam splitter 140, and a filter film. 150. The third light source 160, the second beam splitter 170, the light uniformity element 180 and the diffusion sheet 190.

The design of each component will be described separately below. The first light source 110, the second light source 120 and the third light source 160 are respectively used to output the first light L1, the second light L2 and the fourth light L4. The first light source 110 , the second light 120 and the third light 160 may respectively include, for example, a laser diode (LD) chip, a light-emitting diode (LED) chip that can emit various visible lights, and a package thereof. any of. In this example, the first light source 110 includes a red light emitting diode chip, and the first color is substantially red. More specifically, the first light L1 has a corresponding spectral energy distribution curve (spectral energy distribution curve) in a spectral energy distribution diagram, and the peak of the distribution curve falls in red (for example, 620 nanometers to 750 nanometers). within the wavelength range. In addition to the light-emitting chip itself, the first light source 110 must also be provided with a lens (not labeled) with diopter to converge the divergence direction of the light.

In this example, the second light source 120 includes a blue laser diode array (BlueLaser diode bank) that can emit the second light, and the color of the light emitted by the second light is the second color, which is essentially blue. Similarly, the peak of the distribution curve of the second light L2 falls in the wavelength range of blue (for example, 440 nanometers to 460 nanometers). In addition to the light-emitting chip itself, a microlens matrix with a layout corresponding to each of the aforementioned laser diode chips must also be provided above the second light source 120 to adjust its light pattern.

In this example, the third light source 160 includes a light-emitting diode chip that can emit a fourth light, and the color of the light emitted by the fourth light is the second color, which is essentially blue. For example, the peak of the distribution curve of the fourth light L4 falls in the wavelength range of blue (for example, 440 nanometers to 460 nanometers). It should be noted that the wavelength of the light emitted by the third light source 160 is similar to the wavelength of the second light source 120 , but does not necessarily need to be exactly the same. For example, the corresponding wavelength value of the wave peak of the second light beam L2 may be slightly smaller than the corresponding wavelength value of the wave peak of the fourth light beam L4.

On the other hand, in this example, the system includes a reflector 130 . The reflector 130 generally refers to an optical element that changes the traveling direction of light. In this case, the reflector is the phosphor wheel. To be more specific, the reflector 130 includes a substrate 132 , a reflective layer 134 , a wavelength conversion material layer 136 and a motor 138 . The base plate 132 is, for example, an annular sheet, and the middle ring body of the annular sheet is embedded on the rotating shaft of the motor 138 , so that the base plate 132 is suitable to be driven by the motor 138 to rotate. In addition, the reflective layer 134 is provided on the substrate 132 , and the wavelength conversion material layer 136 is provided on the reflective layer 134 . The wavelength conversion material layer 136 includes phosphor. The phosphor can be a phosphor that emits green, yellow or other colors of light, and the invention is not limited thereto. In this embodiment, the wavelength conversion material layer 136 can receive the blue light of the second light L2 and generate the conversion light CL by stimulating the photoluminescence phenomenon of the phosphor in the wavelength conversion material layer 136 . The converted light CL includes, for example, a third color, and the peak of the converted light CL falls within the range of 495 nanometers to 570 nanometers. For example, the wavelength of the converted light CL may be 540 nanometers. At the same time, in some related embodiments, a part of the second light L2 will not be absorbed by the phosphor but will be reflected together with the conversion light CL. That is, in addition to the conversion light CL, the third light also includes part of the conversion light CL. The blue light from the second light L2 is unabsorbed.

Furthermore, in this embodiment, the system is provided with a first beam splitter 140 . Generally speaking, the first beam splitter 140 generally refers to an optical element with a light splitting function, such as a half-reflective half-mirror, a polarizer that uses P and S polarity light splitting, various wave plates, and various prisms that use the incident angle to split light. Beam splitters using wavelength splitting, etc. In this example, the first beam splitter 140 uses a wavelength splitter, that is, a dichroic mirror (DM). The first beam splitter 140 has a first surface S1 and a second surface S2. The first surface S1 and the second surface S2 are, for example, arranged opposite to each other. In this embodiment, the first surface S1 is wavelength selective. FIG. 2 shows a simplified plot of light transmittance versus light wavelength of the first surface S1 of the first beam splitter 140 in the embodiment of FIG. 1 . The "wavelength" marked on the horizontal axis of Figure 2 represents the wavelength of light, and the "transmittance" marked on the vertical axis represents the light transmittance (Transmittance) of the first surface S1. In FIG. 2, area I represents the transmittance of blue light with a shorter wavelength, area II represents the transmittance of green light, and area III represents the transmittance of red light with a longer wavelength. Specifically, in this embodiment, the first surface S1 has a coating, for example, and the third light L3 that appears green, for example, is bandpass. Therefore, the first surface S1 may, for example, pass green light and reflect red light and blue light. It should be noted that FIG. 2 only illustrates that the first surface S1 exhibits a bandpass for green light. Practically speaking, the light transmittance of the first surface S1 may have other distributions within a wavelength range depending on process conditions such as coating, and the present invention is not limited thereto. Practically speaking, since coating technology is not easy to form a perfect bandpass for green light as shown in FIG. 2 , in some embodiments, part of the blue light can still pass through the first beam splitter 140 .

Please continue to refer to FIG. 1. In this embodiment, a filter film 150 is provided. Generally speaking, the filter film 150 generally refers to a structure that filters out specific light wavelength bands in the form of reflection or absorption to remove specific wavelengths or colors in the light. Generally speaking, the filter film 150 can be selectively formed on a specific optical surface by coating, bonding, etc., or it can be provided as an independent component. In this embodiment, the filter film 150 is formed on the surface of the specific optical element, and the filter film 150 can prevent most of the blue light from penetrating.

In this embodiment, the system further includes a second beam splitter 170 . The properties of the second beam splitter 170 are similar to those of the first beam splitter 140 . In this example, the second beam splitter is a dichroic member and has wavelength selectivity. More specifically, in this example, the second beam splitter 170 reflects blue light but allows red and green light to pass.

In this embodiment, the system further includes a light uniformity element 180 to uniformize the intensity distribution of the illumination light L5. Generally speaking, the light uniformity element 180 can be an optical element such as a fly-eye lens or a light integration rod, but the invention is not limited thereto. In this example, the light uniformity element 180 is a fly-eye lens.

In this embodiment, the system further includes a diffuser 190 . The diffusion sheet 190 includes, for example, a film layer infiltrated with diffusion particles, a micro-nano structure with increased diffusion effect, or an optical element with a light diffusion effect such as a lens. It includes, for example, a plurality of light diffusion microstructures, which can diffuse light The power of the light of the piece 190 is adjusted.

In this embodiment, the system further includes a light valve adapted to convert the illumination light L5 into the projection light L6. Specifically, the light valve 210 is, for example, a digital micro-mirror device (DMD) or a liquid-crystal-on-silicon panel (LCOS panel). However, in other embodiments, the light valve 210 may also be a transmissive liquid crystal panel or other spatial light modulator, and the present invention is not limited thereto. In this example, the light valve 210 is a digital micromirror element.

In this embodiment, the system further includes a projection lens 220, which is composed of at least one lens. Generally, the projection lens 220 may be provided with an aperture diaphragm inside, and multiple lenses are provided in front and behind the aperture diaphragm to adjust the shape and aberration of the image light.

The arrangement of each element of the projection device 200 and the light transmission process are exemplarily described below. In this embodiment, the first beam splitter 140 is disposed on the transmission path of the first light L1, the second light L2, and the third light L3. Specifically, the first beam splitter 140 is tilted relative to the first light source. To be more specific, the incident angle of the first light ray L1 to the first beam splitter 140 is 45 degrees. The first surface S1 faces the reflector 130 and the second light source 120 , and the second surface S2 faces the first light source 110 and the optical lens 101 .

After the second light source 120 outputs the blue second light L2, the second light L2 passes through the diffusion sheet 190 through the guidance of the optical path. That is, the diffuser 190 is disposed on the transmission path of the second light L2, and the diffuser 190 is disposed between the second light source 120 and the reflector 130 . Specifically, the diffusion sheet 190 is disposed between the first light source 110 and the reflector 130 along the transmission path of the second light L2. After the second light L2 passes through the diffuser 190, it is transmitted to the first surface S1 of the first beam splitter 140. Then, the second light L2 is reflected on the first surface S1 and transmitted to the wavelength conversion material layer 136 of the reflector 130 . After the second light L2 enters the wavelength conversion material layer 136, at least part of the second light L2 is converted by the wavelength conversion material layer 136 into converted light CL including a third color (for example, green). For example, the converted light CL leaves directly in the direction away from the reflector 130 or leaves in the direction away from the reflector 130 after being reflected on the reflective layer 134 . In addition, the second blue light L2 that has not been converted by the wavelength conversion material layer 136 (phosphor) is reflected on, for example, the reflective layer 134 and then leaves in a direction away from the reflective mirror 130 . In this embodiment, since the third light ray L3 includes the converted light CL and the unconverted second light ray L2, the third light ray L3 includes a third color (eg, green) and a second color (eg, blue). The reflector 130 is disposed on the transmission path of the second light L2. It should be noted that in other embodiments, the above-mentioned first color, second color and third color can be designed as other colors according to actual light emission requirements or projection requirements, and the present invention does not use this method. is limited.

FIG. 3 shows a plot of normalized light intensity versus wavelength of the third light ray leaving the reflector in the embodiment of FIG. 1 . Please refer to FIG. 1 and FIG. 3 at the same time. FIG. 3 shows the light intensity of the third light ray L3 at different wavelengths when it just leaves the reflector 130 , and at this time the third light ray L3 includes the converted light CL and the second light ray L2 that is not converted by the wavelength conversion material layer 136 . The "wavelength" marked on the horizontal axis of Figure 3 represents the wavelength of the third light L3, and its unit is nanometer (nm), while the "normalized light intensity" marked on the vertical axis represents the corresponding wavelength of the third light L3. The results after normalization of the measured light intensity below. Specifically, since the third light L3 includes the second light L2 that has not been converted by the wavelength conversion material layer 136, the third light L3 exhibits a small peak in the wavelength band of blue light (for example, around 450 nanometers). In detail, since in the third light ray L3, the light intensity of the green converted light CL is significantly greater than the blue second light ray L2, the third light ray L3 still appears to be green.

Please continue to refer to FIG. 1 . In this embodiment, the third light ray L3 leaving the reflector 130 is transmitted to the first surface S1 of the first beam splitter 140 . Since the first surface S1 can pass green light, for example, at least a part of the third light L3 passes through the first surface S1 and the second surface S2 sequentially and leaves the first beam splitter 140 . However, in practice, since the coating technology is not easy to form a perfect bandpass for green light as shown in FIG. 2 , part of the blue light part of the third light L3 will still pass through the first beam splitter 140 .

In addition, in this embodiment, after the first light source 110 outputs the red first light L1, the first light L1 is reflected on the second surface S2 of the first beam splitter 140 and leaves the first beam splitter 140. In this embodiment, at least part of the third light ray L3 leaving the first beam splitter 140 and the first light ray L1 leaving the first beam splitter 140 pass through the filter film 150 . Specifically, the filter film 150 is used to remove the second color (eg, blue) of the third light L3. For example, the filter film 150 can be used to filter out the second blue light L2 contained in the third light L3 that has not been converted by the wavelength conversion material layer 136 , or the filter film 150 can also be used to filter out the blue second light L2 that is not converted by the wavelength conversion material layer 136 . The blue light mixed in the third light L3 due to other factors. Specifically, the filter film 150 may, for example, prevent the blue light mixed in the third light L3 from passing through the filter film 150 . Therefore, the third light L3 passing through the filter film 150 has relatively pure green light.

In this example, the filter film 150 may be, for example, disposed on the surface S3 or S4 of the optical lens 101 shown in FIG. 1 or the surface S5 of the second beam splitter 170 . Alternatively, the light source device 100 may be provided with other optical elements on the transmission paths of the first light L1 and the third light L3, and the optical elements are provided with the filter film 150 . Or, in another example, the filter film 150 may be an independent component disposed on the transmission path of the first light L1 and the third light L3, and the invention is not limited thereto.

In this embodiment, the third light L3 passing through the filter film 150 and the first light L1 passing through the filter film 150 are transmitted to the second beam splitter 170 , and the blue light of the fourth light L4 is emitted from the third light source 160 . transmitted to the second beam splitter 170. In this embodiment, the second beam splitter 170 passes the first light L1 and the third light L3 and reflects the fourth light L4. That is, the second beam splitter 170 is disposed on the transmission path of the fourth light L4, the third light L3, and the first light L1. Thereby, the first light L1, the third light L3 and the fourth light L4 are combined to form the illumination light L5. The illumination light L5 passes through the light uniformity element 180 located on the transmission path of the illumination light L5 to uniformize its intensity distribution, and then is transmitted to the light valve 210 . Specifically, in this embodiment, the third light L3 leaving the first beam splitter 140 is not reflected before traveling to the light valve 210 . In addition, the light valve 210 converts the illumination light L5 into the projection light L6, and the projection lens 220 is used to project the projection light L6 onto an imaging plane or a screen (not shown) to form an image.

Specifically, the diffusion sheet 190 can adjust the power distribution of the second light L2 passing through the diffusion sheet 190 , and the power of the second light L2 can also be adjusted by driving the voltage or current of the second light source 120 . Figure 4 shows a plot of the conversion efficiency of the converted light versus the half-maximum energy density of the second light with or without a diffuser in some embodiments of the present invention. Please refer to FIG. 1 and FIG. 4 at the same time. In FIG. 4 , the horizontal axis labeled “energy density at half maximum width” represents the energy density at half maximum width of the second light L2 emitted by the second light source 120 , and its unit is Watt/mm square (W /mm ² ). In addition, the vertical axis marked "efficiency" represents the conversion efficiency of the second light L2 converted into the converted light CL by the wavelength conversion material layer 136, and its unit is lumens/watt (lm/W). In FIG. 4 , the square data points are data points where the light source device 100 is not provided with the diffusion sheet 190 , and the diamond-shaped data points are the data points where the light source device 100 is provided with the diffusion sheet 190 . Specifically, when the half-width energy density of the second light L2 is too small, the phosphor of the wavelength conversion material layer 136 will absorb the second light L2 and will not convert the corresponding conversion light CL, resulting in a decrease in conversion efficiency. Not good. In addition, when the half-width energy density of the second light L2 is too large, the phosphor of the wavelength conversion material layer 136 may, for example, undergo a thermal quenching effect, resulting in poor conversion efficiency. In this embodiment, if you want to achieve better conversion efficiency, the half-width energy density of the second light L2 falls between 5 and 60 watts/mm square to achieve the basic effect. Preferably, the half-width energy density of the second light L2 falls within a range of 5 to 30 watts/mm square, for example. In addition, when the half-width energy density of the second light L2 falls between 5 and 21 watts/mm square, the conversion efficiency of the phosphor to convert the second light L2 into the conversion light CL can be optimal. For example, in this embodiment, the half-width energy density of the second light L2 is 20.8 watts/mm square. In addition, under the maximum operating condition, when the light source device 100 is provided with the diffusion sheet 190 , the conversion efficiency may be increased by, for example, 9.5%.

Please continue to refer to Figure 1. In this embodiment, the light source device 100 also includes a plurality of optical lenses 101, 103, 105, 106, 107, 109 and a reflector 102, and these optical lenses 101, 103, 105, 106, 107 , 109 and the reflector 102 are at least used to guide the progression of the first light L1, the second light L2, the third light L3 and the fourth light L4. In addition, the projection device 200 also includes a plurality of obliquely arranged optical lenses 201, 203 and prisms 202, and these optical lenses 201, 203 and prisms 202 are at least used to guide the progression of the illumination light L5 and the projection light L6. Specifically, the number and arrangement positions of the above-mentioned optical lenses 101, 103, 105, 106, 107, 109, 201, 203, reflector 102, prism 202 and other optical elements are only for illustration and are not intended to limit the present invention. invention.

In this embodiment, since the reflector 130 is used to receive the second light L2 and output the third light L3, the light source device 100 does not need to use a light combining structure of a phosphor wheel that has both penetration and reflection. In addition, it is not necessary to provide an area that can transmit blue light on the reflector 130 as a phosphor wheel, and the light source device 100 does not need to be provided with an optical path structure for guiding the blue light that penetrates the phosphor wheel. In addition, the blue light in the illumination light L5 may be provided by the third light source 160 . Therefore, the light source device 100 can have a simpler optical path structure. The light source device 100 has fewer optical components, so that the assembly time of the light source device 100 can be effectively reduced. In addition, in the light source device 100 of the embodiment of the present invention, when the third light L3 passes through the filter film 150, the filter film 150 can filter out the light wavelength band corresponding to blue in the third light L3, so through the filter The third light L3 of the film 150 has a relatively pure green color, which enables the projection device 200 using the light source device 100 to have a wider color gamut. In addition, based on the optical path structure of the light source device 100, the first surface S1 of the first beam splitter 140 of the light source device 100 can be designed to allow the green third light L3 to pass through and reflect the red first light L1 and blue Therefore, the first beam splitter 140 may be designed to pass the second light L2 corresponding to the green light band. Compared to allowing multiple intermittent light wavelength bands with different colors to pass through, the coating design of a spectroscope that allows a single color light band to pass through is relatively simple and easier to produce. Therefore, the manufacturing difficulty and cost of the first beam splitter 140 are relatively low, which makes the light source device 100 using the first beam splitter 140 more cost-effective.

FIG. 5 shows a schematic structural diagram of a light source device and a projection device using the light source device according to another embodiment of the present invention. Please refer to FIG. 5 . The light source device 500 and the projection device 600 are similar to the light source device 100 and the projection device 200 in the embodiment of FIG. 1 . The differences are as follows. In this embodiment, the light source device 500 includes a reflective substrate 530 , and the reflective substrate 530 has a phosphor layer 536 . The phosphor layer 536 is, for example, laid on the surface of the reflective substrate 530, and the phosphor layer 536 is similar to the wavelength conversion material layer 136 in the embodiment of FIG. 1, for receiving the second light L2 from the second light source 120 and outputting The third ray L3 of the third color. Specifically, in this embodiment, the first surface S1 of the first beam splitter 140 is used to reflect the second light L2 to the reflective substrate 530 . The second light L2 reflected by the first beam splitter 140 may enter the phosphor layer 536 , and the second light L2 is converted into a third light L3 by the phosphor layer 536 . The third light ray L3 includes the converted light CL in the third color and the unconverted light ray in the second color. In addition, the third light L3 is, for example, reflected on the reflective substrate 530 and then emitted in a direction away from the reflective substrate 530 . In detail, the light source device 500 and the projection device 600 can at least achieve technical effects similar to those of the light source device 100 and the projection device 200 in the embodiment of FIG. 1 . The light source device 500 has a simplified optical path structure, and the projection device 600 using the light source device 500 has a wider color gamut and better cost-effectiveness.

To sum up, in the relevant embodiments of the present invention, since the reflector of the light source device receives the second light and outputs the third light, the light source device can have a simpler optical path structure. In addition, the filter film of the light source device is disposed on the transmission path of the first light and the third light, so the third light passing through the filter film can have a purer color, so that the projection device using the light source device has a wider range of colors. area. In addition, based on the optical path structure of the light source device, the beam splitter of the light source device can be designed to pass the light band corresponding to the third color, so that the light source device has better cost-effectiveness. The diffusion sheet is used to increase the conversion efficiency of the wavelength conversion material layer to achieve better conversion efficiency.

Although the present invention has been disclosed above through embodiments, they are not intended to limit the present invention. Any person skilled in the art can make some modifications and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention is The protection scope of the invention shall be determined by the claims.

Claims (10)

1. A light source device, including: The first light source is used to output the first light; The second light source is used to output the second light; A reflector, disposed on the transmission path of the second light, the reflector having a wavelength conversion material layer, the wavelength conversion material layer receiving the second light and converting it to output a third light; A first beam splitter, disposed between the first light source and the second light source and only disposed on the transmission path of the first light, the second light and the third light; A filter film is disposed on the transmission path of the first light and the third light, and the first beam splitter is disposed between the reflector and the filter film; and A diffusion sheet is provided on the transmission path of the second light and between the second light source and the first beam splitter. The diffusion sheet is used to increase the conversion of the wavelength conversion material layer. efficiency. 2. The light source device according to claim 1, wherein the diffusion sheet is configured so that the half-width energy density of the second light falls between 5 and 60 watts/mm square. 3. The light source device according to claim 1, wherein the first light includes a first color, the second light includes a second color, the third light includes a third color and the second color, so The filter film is used to remove the second color. 4. The light source device according to claim 1, wherein the first beam splitter has a first surface and a second surface, the first surface is configured to reflect the second light to the reflector and allow At least a portion of the third light ray passes through and the second surface is configured to reflect the first light ray, wherein at least a portion of the third light ray exiting the first beam splitter and the first beam splitter The first light passes through the filter film. 5. The light source device according to claim 1, further comprising a third light source and a second beam splitter, the third light source is used to output fourth light including the second color, and the second beam splitter is configured On the transmission path of the first light, the third light and the fourth light, the second beam splitter is used to combine the first light, the third light and the fourth light . 6. A light source device, including: The first light source is used to output the first light; The second light source is used to output the second light; A reflective substrate having a phosphor layer, and the phosphor layer is used to receive the second light and convert it to output a third light; The first beam splitter is only disposed on the transmission path of the first light, the second light and the third light. The first beam splitter has a first surface and a second surface. The first surface configured to reflect the second light ray to the reflective substrate and allow at least a portion of the third light ray to pass through, and the second surface is configured to reflect the first light ray; A filter film is disposed on the transmission path of the first light and the third light, and the first beam splitter is disposed between the reflective substrate and the filter film; and A diffusion sheet is provided on the transmission path of the second light and between the second light source and the first beam splitter. The diffusion sheet is used to increase the conversion of the wavelength conversion material layer. efficiency. 7. The light source device according to claim 6, wherein the diffusion sheet is configured so that the half-width energy density of the second light falls between 5 and 60 watts/mm square. 8. The light source device according to claim 6, the first light includes a first color, the second light includes a second color, and the third light includes a third color and the second color. 9. The light source device according to claim 6, wherein at least a portion of the third light ray leaving the first beam splitter and the first light ray leaving the first beam splitter pass through the filter film, At least a portion of the third light ray exiting the beam splitter includes the third color and the second color, and the filter film is used to remove the second color. 10. The light source device according to claim 6, further comprising: a third light source for outputting fourth light including the second color; A second beam splitter is disposed on the transmission path of the first light, the third light and the fourth light, wherein the second beam splitter is used to combine the first light, the third light ray and said fourth ray.